Molding flask



Seht'. 29, 1925.

J. A. SPERRY HOLDING FLAsK Filed April 18., 1923 2 Sheets-Shoot 1 lumMmm

noemtoz fof/NA. Sas-@ex Sept. 29, 1925.

J. A. SPERRY MOLDI NG FLASH 2 Shqetsf-Shesf 2 Filed April 18, 1923 v .9%8 80 2 m 2.. 8 ,m u 3 2 w 0.4/0 x uw w 1 0.2 2 6 g Mr v M Al 1 3 m i 4An mi .L L Usf FI.. W 4/. wl 3. w/ 3 3g W 2 Patented Sept. 29, 1925.

"UNITED STATES JOHN A. SPERRY, OF MUNNSVILLE, NEW YORK.

MOLDING FLASK.

Application filed April 18, 1923. Serial No. 632,946.

To all whom t may concern.'

Be it known that I, JOHN A. SPERRY, of Munnsville, county of Madison,and State of New York, have invente-d certain new and usefulImprovements in a Molding Flask, of

which the following is a'specilication.

This invention relates to molding flasks, and more particularly toflasks adapted for vmanual manipulation.

The prime object of the invention is to provide a flask, such that itmay be removed from the mold with the expenditure of a minimum of timeand labor upon the part of the operator.

Another object of the invention is to provide a flask of the abovecharacter, with iur proved means for freeing itself from the mold.

Another object of the invention is to provide improved means forretaining in the cope that part of the mold formed therein,

while the cope is being manipulated to po-l sition it upon the dragafter the pattern drawing operation.

A further object of the invention is to provide a flask which can befreed from Jthe mold without danger of disturbing the block of sanaconstituting the mold, and whereby no entrance is made into the mold,such as are made by devices now employed to hold the sand block formedin the cope during -the handling of the latter to position it upon thedrag.

A still further object of the invention is to provide a strong durableflask, capable of withstanding without injury or impairment ofefficiency, the rough usage or handling to which these devices areordinarily subjected, which eliminates several objectionable featurespresent in flasks of this character as hitherto constructed, and whichmay be manipulated with a great saving of 1seth time and labor.

ther objects and aims of the invention, 45 more or less specific thanthose referred to above, will be in part obvious and in part ypointedout in the course of the following drag, whereby the sand is displacedand the description of the elements, combinations, arrangements of partsand applications of principles, constituting the invention; and thescope of protection contemplated will be indicated in the appendedclaims.

In the accompanying drawing, wherein there is illustrated a preferredform of em bodiment of my invention:

yFigure 1 is a side elevational view of my improved flask, showing theparts in position to remove the flask from the mold, the normal positionof certain of the parts being indicated in dotted lines.

Figure 2 is a top plan view ofFigure 1.

Figure 3 is an end elevational view with the parts in the positionillustrated in Fig. 1, parts of the end members of the flask beingbroken away better to illustrate the construction; and Y Figure 4 is anend view of my improved flask, showing the way in which the same isoperated to free itself from the mold, parts of the side walls of thefiask being broken away.y

Before proceeding to describe the details of construction of my improvedflask, it may here be noted lthat a considerable factor of the cost ofsand castings resides in the labor cost expended in the formation of thesand molds. It is a well known fact that great losses are entailed bycareless manipulation of the cope in .positioning it upon the quality ofthe castings impaired, or the castings destroyed. Moreover, in the artof casting it has heretofore been necessary to employ skilled labor inthe operation of forming the molds, thereby increasing the cost of thecastings. I aim by my present Iinvention to decrease the cost ofhand-cast ing production, by producing a flask which can be operated byunskilled laborers or workmen, and which is of such construction thatcertainty of perfect casting production is assured, insofar as theformation of the molds is concerned.

Referring now to the drawings, wherein similar reference charactersrefer to similar parts, the reference numeral 1 indicates the cope, and2 the drag, the two parts constituting the flask. Each of these parts isformed by side and end walls firmly sccured together as by means of thcmetal straps 3, to provide substantially rectangular boxes adapted to beassociated in the manner illustrated in the drawings with the copepositioned upon the drag in such a position that the inner surfaces ofthe end and side walls will be in exact registry. The side and end wallsof both the cope and drag are inclined Slightly inwardly from thevertical, as is usual in flask construction, whereby the latter may bemore easily freed from the sand block.

The side and end walls of the cope 1 upon their inner surfaces areprovided with a plurality of relatively shallow surfaces, the purpose ofwhich will be hereinafter eX.- plained.

Cope and drag have co-operating means whereby they may be placedtogether in the position shown in the drawings with great eXactness,whereby the out-lines or edges of the mold formed in the respectiveparts will lie in exact registry. This means in the present instance,and which forms no part of my present invention, comprises tapered pins5 and 6 carried upon the flanges 7 and S upon angle-irons 9 and 1()fastened upon the opposite side members of the drag, as by means of thescrews 11. 'ln the present instance the pins 5 and 6 are provided withthreaded extensions which pass thrcugn apertures formed in the flanges 7and 8 and are fastened to said flanges as by means of the nuts 12,threaded upon said extensions.

The side walls of the cope are likewise provided with angle-irons 13 and1&1-, having the flanges 15 and 16 in which are former tapered apertures17 and 18, the walls of which are inclined to correspond with the taperof the pins 5 and 6 so that when the cope is placed upon the drag, asshown, the aforesaid perfect registry of the inner walls of the cope anddrag, and of the margineL portions of the molds, is assured.

rlhe reference numeral 19 indicates the presser board of the cope, and2O the presser board of the drag. These presser boards, as is well knownin the art, are employed in the molding machine to squeeze or press thesand tightly, respectively, into the cope and drag, and it will be notedthat the thicknesses of the presser boards 19 and 2O are such that afterthe squeezing operation, the upper and lower surfaces of both presserboards are located above and below respectively, of the correspondingends of the cope and drag.

The reference numeral 21 indicates the sand forming mold block, and 22the mold which has been formed in the sand block,

one part 23 of the mold having been formed in the cope, and the otherpart 2li having been formed in the drag.

The construction thus far described, with the exception of the grooves lformed upon the inner surfaces of the walls of the cope,is well known inthisart; description thereof, however, being deemed essential in ordertnat my invention, which I shall now proceed to describe, may be morefully understood.

Briefly stated, my invention comprises a pair of devices mounted uponthe cope, and operated by the hands of the operator' when the latter isengaged in lifting the flask from the mold7 means being provided forholding the presser board of the cope stationary during the initialupward movement of the flask when lifted by the operator, whereby theflask is lifted cleanly from the mold without in anywise disturbing thelatter. This means two of these devices are provided upon each cope, oneon either side adapted and arranged for simultaneous manipulation by theoperator, one device being located near the forward end of one side ofthe cope, and the other upon the opposite rearward side thereof, theparts being oppositely disposed. Inasmuch as these devices are ofidentical construction, but one thereof need be described.

Referring now to the device upon the righthand side, the referencenumeral 25 indicates a lever, pivotally mounted upon a screw or bolt 26,carried upon the strap 3 of the cope. This lever extends inwardlysubstantially parallel for a part of its length with the side wall ofthe cope, indicated at 27, whence it extends outwardly as at 28, at anangle, whence it extends inwardly as at 29, which latter part' issubstantially parallel with the side wall of the cope. This outer part29 forms a handle, and is located adjacent and above the flange 8 of thedrag,l which latter part, as will hereinafter be described, forms afinger or hand-hold for the operator of the flask, the dotted line 30showing the manner in which the lower surface of this flange 8 isformed, whereby it may be more readily grasped by the operator.

Pivotally mounted, as at 31, upon the part 27 of the lever 25, is a rod32, the upper end of which is provided with an inwardly formed extension33, which when the parts are in the position shown in the full lines ofeach ligure of the drawing, overlies the presser board 19 of the cope.The rod 32, its lateral extension 38, and the lever 25, when these partsare in normal position, occupy the positions shown in the dotted linesof Fig. 1 of the drawings, in which position the lateral extension 33 isreceived underneath a catch or shoulder 34, formed upon the end wall ofthe cope, a recess 35 being formed in the end Wall of the cope Cil atlits -upper end to reeeivefsaid part.y The catch 34 may ble-convenientlyformed by-*the metal straps 36 and 37, which-are attached to the upperends. ofthe side and end lpieces of the cope, the recess being formed vby cutting away -a.portion ofthe end and side wall of the copedirectlybeneath the catch 35 vof thesemetal straps, which has its end 33slightly depressed to Aform a point over which passes the extension 33of the rodA 32.

...Positioned about thepscrew or bolt 31 which pivotallyconnectsthe rod32 with the lever 25 is a .spring 39,the end 40 of which engages withthelever 25 and the opposite vend 41Vwith 42v of the rod 32.` "The tendencyof this spring is toswing said. rod and the lever 25 to -the .positionsshown in the full lines ofthe drawings; the uppermost position of thelever, and consequentlythe position of the rod, beingvdetermined by theengagement of saidlever fwith .astrap 43, which is formed .by .a strapextend-ing between a `fiXedA-point 44 andf-the strapqiron 3. This strap43 performs the triple function of a stop fortheupward movement of lthelever 25, as la guide for .the-rod* 32, and as a reinforcingvmember forthat vpart ofthe cope Aupon which :is mountedthe-above described device.

, The strap 43 is; held spaced 4from the side of the -cope by V means-of theboss 45 and the spacer :memberf 46.- Having described my..improveddevice, 4I shallnow proceed to describe thel operation thereof.

At this point -it willb e noted that when .the sand has .been pressedinto theycope bythe squeezingfioperation, portions 46 of thesandhavebeen forced intothe grooves ,4.y and these integrally fOrrnedlportions or .ribs of thesand .bloek; projecting `into the grooves orrecesses 4,serve to Ahold-the sand `block inthe cope during its handlingto invert .it and- `mount it upon -the drag.

. It `will ybe understood that when ftlie=cle-l vices are not infuse,the parts occupy vthe positions shown inthe dottedlinesl of Fig. l, inwhich constructionsthe extension 33 is received underneath the catch34,',the lever 25 being in its lowermost positionjnThe parts areiheldinthis position bythe engagement ofthe extension 33 ofthe lever, andthecatch 34. In operating the .device the handle is lifted by theoperator, -whereupon v.the `extension 33 of .the lever 32 is forcedoutof its recess vand over the point 3S ofthe catch34, whereupon the@poration of the spring -39v will. swing the lever 32 to the positionshown in the full 'lines ofthe drawing, said rod321being of-sufficientlength to letr the extension 33 clearthe edge of the presser board 19.-The up-wardmovementv of the lever 25 -is arrested by its engagementwiththe wfstrajp,43. The. f, opera- -a--rearward extensiontorthenfdepresses Vthe handle 29 ofthe lever 25 with-the vpalm of his hand,and vinserts and catches `the tips off-his fingers underneath. theflange 8.

33 and the lever into engagement with the presserboard. The operatorthereupon contracts his hand to force the lever 25 down- -wardly,;and atthe same time lifts the'entire flask by means of his fingers, which arein engagement with the flange 8, whereby the extension 33, which may betermed a presser member, through the presser board 19, .holds vthe sandblock stationary on vthe 4presser board 20 ofthe cope, whereupona slightupward movement of the flask shears ofl" the ribs of sand 46 from thesand block, whereuponfthe entire flask may be readily lifted Afrom themold.

Y It will be noted, due to the inclinedsurfaces of the inner wall of thezflask,.'but a slight movement is necessary tov .affect this shearingaction, as `will be ,seen from an inspection of Fig. 4 of the drawings.

rlhe cope and .dragl are then disengaged and the parts whose Operationyisnext above described, are returned fto the position shown in thedotted lines of Fig. 1.- rIhis Ioperation is effected bymerel-y swingingthe rod 32 rearwardly and `causing the `extension or presser member 33to--aga'in engage with the catch 34.

It .will accordingly be seen that I have provided aconstructionwelladapted` to attain, among others, all -theends and objects y l abovepointed out in an exceedingly simple manner. The use of my improved.ldevice greatly facilitates :disengagement lof the flask from thelmold,and rsuch disengagement is effectedr by without in any fway disturbingthe sand mold, the surfaces Aof the mold being free and clear, from anyridges or -grooves usually formed by finovable devices extendinglinwardly fromthe cope for effecting the locking operation between thecope and the sand block.

Having ythus described Vmy .invention what I claim' as newand .desire tosec-ure by Letg ters Patent is:

1. In .device of the class' described, the combination with a flaskcomprising two or more parts, andmeanscarried by one of said parts forholding the mold stationary when the flask is being drawn therefrom.

2. In ai device of the class described, the combinationwith a. flaskcomprising one or more-parts, and means for pressing the mold downwardly-when the flask is-liftedftlierefrom.

3. In a device of the class described, :the combination witha Aflaskcomprising one or more parts, and -means manipulated by the hands oftheoperator forpressing the mold lownwardly when the flask is liftedthererom.

rlhis operation Ahas carried the extension 4. In a device of the classdescribed, the co-mbination with a flask comprising one or more parts,and mea-ns for manually effecting a slight relative movement between themold and the flask at the instant the flask is lifted from the mold.

5. In al device of the class described, the combination with a. flaskcomprising two or more parts including a cope and its presser board, andmeans carried by the cope and engaging the presser board for exertingpressure therein when the flask is moved relatively to the mold.

6. In a device of the class described, the combination with a. flaskcomprising two or more parts including a cope and its presser' board,and means carried by the cope and enga-ging the presser beard adapted tobe manually operated for exerting pressure therein when the flask ismoved relatively to the mold.

7. In a device of the class described, the combination with a flaskcomprising two or more parts, including a cope, said cope and its sandblock having mutually engaging parts, and means carried by the cope forsevering one set of said mutually engaging parts simultaneously with theoperation of lifting the flask from the mold.

8. In a device of the class described, the combination with a flaskhaving a plurality of parts including a cope and its presser board, anda device mounted upon the cope for exerting pressure upon said presserboard in a direction contrary to the movement of the flask when it isremoved from the mold.

9. In a device of the class described, the combination with a` flaskhaving a plurality of parts including a cope and its presser board, anda plurality of devices mounted upon the cope for exerting pressure uponsaid presser board in a direction contrary to the movement of the fiaskwhen it is removed from the mold.

10. In a device of the class described, the combination with a flaskhaving a. plurality of parts including a cope and its presser board, anda. plurality of devices engaged and operated by the hands of theoperator mounted upon the cope for exerting pressure upon said presserboard in a direction contrary to the movement of the flask when it isremoved from the mold.

l1. In a device of the class described, the combination of a fiaskcomprising two or more parts, including a cope, and means mounted uponthe cope for exerting pressure upon the mold while the flask is beingremoved therefrom.

12. In a device of the class described, in combination, a flaskcomprising a plurality of parts including a cope and a drag, andco-operating means upon the cope and drag for lifting the flask from themold, and at the same time holding the mold stationary at the instant ofthe beginning of the flask lifting' operation.

13. In a device of the class described, the combination with a flask,comprising two or more parts including a cope, said cope having aplurality of recesses in its inner surface for receiving portions ofthat part of the mold enclosed therein, and means provided upon the copefor pressing upon the mold when the flask is lifted, whereby saidportions of the sand received in its recesses are sheared off when theflask is lifted.

14. In a device of the class described, in combination, a flaskcomprising a plurality of parts including a cope, the inner surface ofsaid cope being provided with a plurality of recesses adapted to receiveprojecting portions of the sand block, whereby the latter is locked inthe cope, and means whereby said projecting portions o-f the sand blockare sheared ofi1 to free the sand block when the flask is removed fromthe mold.

15, In a device of the class described, in combina-tion, a askcomprising a plurality of parts including a cope and a drag, said copebeing provided with a presser board, oppositely disposed handlesprovided upon the drag, a plurality of presser members carried by thecope adapted to be moved in position above said presser board, andoperative means for said presser members located adjacent the handles ofsaid drag adapted to be enga-ged by the hands of the operator whenlifting the drag to cause said presser members to engage with saidpresser board.

16. In a device of t-he class described, the combination with a flaskcomprising two or more parts including a drag and a cope, a

Apresser beard for said cope, a lever pivoted to said cope, a rodpivoted to said lever, havmg a presser member, means whereby said rodand its presser member are held in inoperative position upon said cope,means whereby said rod may be moved to carry said presser member abovesaid presser board, and said lever being adapted to be operated when theflask islifted, to move said rod, whereby its presser member is carriedinto engagement with said presser board.

17. In a device of the class described, the combination with a fiaskcomprising two` or more parts including a cope and a drag, a presserboard for said cope, a plurality of levers pivoted upon opposite sidesof the cope, a rod pivoted to each of said levers, each of said rodsbeing provided with a lateral extension, means upon said cope forholding said rods and their lateral extensions in inoperative positions,means for moving said rods and their lateral extensions into operativepositions above said cope, a presser board adapted to rest upon the moldabove said cope, handles tor "when lifting the desk to cause said laberal extensions of said rods to engage with the presser board of thecope and press the latter downwardly when the liask is lifted from themold.

In testimony whereof, I aiX my signature.

JOHN A. SPERRY.

